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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






2. Implies the amount of estrogen production






3. FEED






4. (LH) causes female's egg to break (her period)






5. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






6. What helps regulate spermatogenesis?






7. Actual heat cycle (period)






8. 19-23 (21) days






9. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






10. (LH) stimulates the Leydig cells to produce testosterone






11. 45-60 days after breeding; re-breed as required






12. Not under a timeline - cow can not be sold as steak






13. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






14. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






15. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






16. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






17. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






18. Help to signal hormone levels which we need both in the brain right next to each other.






19. Produce testosterone. located between the seminiferous tubules






20. 19-23 (21) days






21. 30 hours after estrus begins






22. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






23. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






24. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






25. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






26. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






27. 1-2 days






28. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






29. 336 days






30. 283 days






31. Failure to have both testis (gonads) descend






32. 2 month growth cycle. stored in the epididymis of the bull






33. Birthing process (termination of gestation)






34. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






35. Contains and regulates the temp of the testes for sperm production






36. 14-19 (17) days






37. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






38. (male) pushes the testes upward toward the body for warmth or protection






39. ~60 days before calving






40. When are dairy cattle dehorned?






41. Animals which have many estrous periods per year (ex: cow - sow)






42. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.


43. (switzerland) 2nd in size and milk production - most muscle -






44. 114 days






45. Can survive ~7 days in cow. vast majority <48 hours






46. Luteolysis happens because of the ____________ hormone






47. Start of the reproductive tract for the female. located outside of the body






48. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.


49. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






50. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders